Pull locking fixes from Thomas Gleixner:
"A few fixes for lockdep:
- initialize lockdep internal RCU head after initializing RCU
- prevent use after free in a alloc_workqueue() error handling path
- plug a memory leak in the workqueue core which fails to free a
dynamically allocated lock name.
- make Clang happy"
* 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
workqueue, lockdep: Fix a memory leak in wq->lock_name
workqueue, lockdep: Fix an alloc_workqueue() error path
locking/lockdep: Only call init_rcu_head() after RCU has been initialized
locking/lockdep: Avoid a Clang warning